Holder For Electric Components

ABSTRACT

The invention relates to a holder ( 1 ) for holding an electrical component with wire ends ( 51   a ), which are used as electrical connections of the component. The holder has a body ( 10 ) with a center part, in which a recess ( 2 ) that is open towards the top is formed for holding the component. The vertical side walls of the recess ( 2 ) have slots ( 3 ), which are open towards the top and which are suitable for guiding the wire ends ( 51   a ) of the component.

The invention relates to a holder for an electrical component, e.g., a toroidal-core inductor, and also to a component with the electrical component and the holder.

Plastic holders for toroidal-core inductors with plug or connection pins anchored in the body of the holder and devices for voltage isolation of different wire windings of the toroidal-core inductor are known, e.g., from the publications DE 3318527 A1, DE 9412107 U1, and EP 0468314 B1.

From the publication U.S. Pat. No. 5,309,130, a component with a toroidal-core inductor suitable for surface mounting with two wire windings and a holder is known. The holder has a recess in which the toroidal-core inductor is mounted. Projections for winding the wire ends of wire windings are provided on the body of the holder. Openings, through which the wire ends are guided loosely, are provided in the wall of the recess. The wire ends are attached to the respective projections. In the fabrication of such a component, it is difficult to automate the passing of the wire ends through the openings.

The object of the invention is to specify a holder for an electrical component which is suitable for completely automated fabrication of the corresponding component.

This problem is solved according to the invention by a holder with the features of claim 1. Advantageous configurations of the invention follow from the other claims.

The invention specifies an electrically insulating holder for holding an electrical component with wire ends, which are used as electrical connections for the component. The holder has a body with a center part in which a recess is formed for holding the component. The side walls of the recess have slots suitable for guiding wire ends of the component. Both the recess and also the slots are open towards the same side of the body. This side is designated as the top side of the body.

Fixing the wire ends of the electrical component in the slots of the recess holding this component has the advantage that the distance between different wire ends of the component is fixed by the distance of the slots.

The holder according to the invention can be used in a component with an electrical component, e.g., toroidal-core inductor. The electrical component can be, e.g., a toroidal-core inductor with a closed magnetic core and two different wire windings to be isolated from each other. The electrical component can be adhered or encased in the recess.

The slot preferably represents a longitudinal slot. The slot can also extend, however, at an angle to the longitudinal axis of the holder.

The width of the slot is preferably selected as a function of the diameter of the wire end, so that the wire end is held rigidly, e.g., pinched, in this slot.

The recess is preferably a blind hole recess, that is, a recess with a closed base. In the component, on the outside the base of the recess forms a surface, which can be used, for example, for labeling the component and for handling by means of a vacuum gripper.

The cross section of the recess perpendicular to the longitudinal axis of the holder is preferably adapted to the shape of the electrical component.

In a preferred variant, the holder has first projections for winding wire ends, wherein the first projections are arranged on the side surfaces of the holder. A first projection can have a collar, which faces away from the body and whose surface runs perpendicular to the longitudinal axis of the first projection. A groove for guiding the wire end is preferably provided on the first projection.

When winding the wire ends onto the first projections, contacts of the component are formed, wherein the modular dimension between different wire ends need not be maintained (through additional measures). In this way, in particular, other connection elements, such as plug pins, encased, e.g., in the body of the holder, can be eliminated.

Second projections can be formed on the body which are arranged between the slots and the shoulder of grooves and which are used for guiding the wire ends. The second projections prevent the slipping of each wire end towards the top.

The lowest point of a slot is preferably lower than the bottom edge of the first or the second projection (e.g., by a value corresponding to the wire diameter). The wire end is here guided between the slot and the corresponding first projection through the second projection essentially parallel to the base surface of the body.

The position of the first projection and the depth of the groove are preferably selected so that the top edge of the wire end projects past the top surface of the body and forms an electrical contact suitable for surface mounting of the component. The height of the recess is preferably selected so that the electrical component does not project past the top edge of the recess.

The holder is preferably composed of a plastic. The center part and the first and second projections together preferably form a one-piece housing or sub-housing of the component.

The invention is explained in more detail below with reference to embodiments and the associated figures. The figures show different embodiments of the invention in terms of schematic and not-to-scale representations. Identical parts or parts with identical functions are designated with identical reference symbols. Shown schematically are

FIG. 1, the view of the holder according to the invention from below,

FIG. 2A, the front view of the holder according to FIG. 1,

FIG. 2B, the side view of the holder according to FIGS. 1, 2A,

FIG. 3, the view of the holder from above,

FIG. 4, the view of a component with the holder according to FIGS. 1-3 and a toroidal-core inductor from below,

FIG. 5, the front view of the component according to FIG. 4 in a front view,

FIG. 6, the view of the component according to FIGS. 4, 5 from above.

In FIGS. 1-3, a holder for holding a toroidal-core inductor is shown.

FIG. 1 shows a holder 1 with a body 10. The body 10 has a center part, which is used for holding the electrical component, e.g., toroidal-core inductor. The center part of the body 10 is essentially cylindrical. In the body 10 there are four first projections 11 and four second projections 12, which are each connected to the center part 10. The longitudinal axis of the first projections 11 runs parallel to the top side of the body 10. The first projections 11 are arranged on opposing side surfaces of the body 10.

The projections 11 (or 12) have a mirror-symmetric construction relative to each other and are, in principle, identical. Below, only one first projection and one second projection corresponding to this first projection are described in detail. The description concerns all of the first and second projections shown in the figures.

In the longitudinal section, the first projection 11 has the configuration of a coil body. The projection 11 has a collar 14 and also a groove 13 for guiding a wire end 51 a.

In the side wall of the center part of the body 10 there are slots 3 (FIG. 2A). The slots 3 are open towards the top side of the body 10. Also, the recess 2 is open towards the top side of the body 10.

In FIG. 2B it is shown that the top edge of the first projection 11 runs parallel to the top side of the body 10. Therefore, a contact of the component running parallel to the top side of the body 10 and suitable for surface mounting can be realized in a component with the holder 1 (FIG. 6).

In FIGS. 4-6, a component is shown with the holder 1 according to the invention and a toroidal-core inductor 5. The toroidal-core inductor 5 is arranged lying in the recess 2 of the body 10, with the height of the toroidal-core inductor not exceeding the depth of the recess 2.

The recess 2 is cylindrical. The toroidal-core inductor 5 has a closed magnetic core 53 and also two wire windings 51, 52. The wire end 51 a of the wire winding 51 is first inserted into the slot 3 from above and then guided underneath the second projection 12 towards the first projection 11. The second projection 12 prevents the slippage of the wire end 51 a towards the top. The wire end 51 is wound around the first projection 11. The component contact 51 b of the component is formed by an area of the wire end 51 a projecting past the top side of the body 10.

The component is mounted on a circuit board with its top side shown in FIG. 6 downwards or towards the circuit board. The component contacts 51 b are soldered with connection areas of the circuit board provided for this purpose.

The wire end 51 a is guided in the groove 13 when wrapping around the first projection 11. The collar 14 is also used for guiding the wire end 51 a. A part of the wire end 51 a is tin-plated. This is shown in FIGS. 4-6 with shading.

In FIG. 5, the depth of the slot 3 and the height of the bottom edge of the first and second projection 11, 12 are selected so that the wire end 51 a is guided up to its insertion into the groove 13 essentially parallel to the top side of the body 10. The width of the slot 3 is adapted to the cross-sectional size of the wire end 51 a for a positive-fit connection. The wire end is preferably pinched in the slot 3.

The invention is not limited to the embodiments shown here or to a certain selection of materials. The presented elements can be combined with each other in any number and arrangement. The slot can be replaced, in principle, by any one-sided open recess, e.g., a notch or a groove.

List of Reference Symbols

1 Holder

10 Body

11 First projection

12 Second projection

13 Groove in projection 11

14 Collar of first projection 11

2 Recess in body 10

3 Slot in side wall of recess 2

5 Toroidal-core inductor

51 First wire winding of toroidal-core inductor

51 a Wire end

51 b Contact of component

52 Second wire winding of toroidal-core inductor

53 Closed magnetic core 

1. Holder (1) for holding an electrical component with wire ends (51) as electrical connections of the component, comprising a body (10) with a center part, in which a recess (2) is formed for holding the component, wherein side walls of the recess (2) have slots (3), which are suitable for guiding wire ends (51 a) of the component, wherein the recess (2) and the slots are open towards the same side of the body (10).
 2. Holder according to claim 1, with first projections (11), which are suitable for winding wire ends (51 a), wherein the first projections (11) are arranged on the side surfaces of the holder (1).
 3. Holder according to claim 2, wherein the longitudinal axis of the first projections (11) runs parallel to the plane, in which the top side of the body (10) lies.
 4. Holder according to claim 2, wherein the first projections (11) each have a collar (14) on their side facing away from the body (10), wherein the boundary surface of the collar runs perpendicular to the longitudinal axis of the corresponding first projection (11).
 5. Holder according to claim 2, wherein the first projections (11) have the shape of a coil body in cross section.
 6. Holder according to claim 2, wherein a groove (13) is provided on the first projection (11) for guiding a wire end (51 a).
 7. Holder according to claim 2, wherein the top edge of the first projections (11) runs parallel to the top side of the body (10).
 8. Holder according to claim 2, wherein second projections (12), which are arranged between the slots (3) and the first projections (11) and which are suitable for guiding wire ends (51 a), are formed on the body (10).
 9. Holder according to claim 2, wherein the ends of the slots (3) are positioned more deeply than the bottom edge of the first projections (11) or second projections (12).
 10. Component with the holder according to claim 1, with the electrical component, wherein the electrical component does not project past the top edge of the recess (2).
 11. Component according to claim 10, wherein the wire end (51 a) is guided between the slot (3) and the first projection (11) corresponding to this slot by the second projection (12) essentially parallel to the base surface of the body (10).
 12. Component according to claim 10, wherein the second projections (12) prevent the slippage of the respective wire end (51 a) towards the top.
 13. Component according to claim 10, wherein the position of the first projection (11) and the depth of the groove (13) are selected so that the top edge of the wire end (51 a) projects past the top surface of the body (10) and forms a contact (51 b) suitable for surface mounting of the component.
 14. Component according to claim 10, wherein the electrical component is a toroidal-core inductor (5) and wherein the wire ends (51 a) are the ends of the wire winding (51) of the toroidal-core inductor (5).
 15. Component according to claim 14, in which the electrical component is a toroidal-core inductor (5) with a closed magnetic core (53) and two different wire windings (51, 52). 